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Finding the Fourth Proportional to 272,912.40, 409,222.80 and 114,962.40

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Solution

The fourth proportional to 272,912.40, 409,222.80 and 114,962.40 is: 172,382.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,912.40 : 409,222.80 = 114,962.40 : x
  2. Step 2: Convert to fraction form
    272,912.40/409,222.80 = 114,962.40/x
  3. Step 3: Cross multiply
    272,912.40x = 409,222.80 × 114,962.40
  4. Step 4: Simplify right side
    272,912.40x = 47,045,235,222.72
  5. Step 5: Solve for x
    x = 47,045,235,222.72/272,912.40
  6. Step 6: Final answer
    x = 172,382.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.